354 lines
9.7 KiB
C
354 lines
9.7 KiB
C
/**************************************************************************//**
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*
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* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2020-12-12 Wayne First version
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*
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******************************************************************************/
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#include <rtconfig.h>
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#if defined (BSP_USING_RTC)
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#include <rtdevice.h>
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#include <sys/time.h>
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#include "NuMicro.h"
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#include <drv_sys.h>
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/* Private define ---------------------------------------------------------------*/
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/* convert the real year and month value to the format of struct tm. */
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#define CONV_TO_TM_YEAR(year) ((year) - 1900)
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#define CONV_TO_TM_MON(mon) ((mon) - 1)
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/* convert the tm_year and tm_mon from struct tm to the real value. */
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#define CONV_FROM_TM_YEAR(tm_year) ((tm_year) + 1900)
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#define CONV_FROM_TM_MON(tm_mon) ((tm_mon) + 1)
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/* rtc date upper bound reaches the year of 2099. */
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#define RTC_TM_UPPER_BOUND \
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{ .tm_year = CONV_TO_TM_YEAR(2038), \
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.tm_mon = CONV_TO_TM_MON(1), \
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.tm_mday = 19, \
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.tm_hour = 3, \
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.tm_min = 14, \
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.tm_sec = 07, \
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}
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/* rtc date lower bound reaches the year of 2000. */
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#define RTC_TM_LOWER_BOUND \
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{ .tm_year = CONV_TO_TM_YEAR(2000), \
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.tm_mon = CONV_TO_TM_MON(1), \
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.tm_mday = 1, \
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.tm_hour = 0, \
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.tm_min = 0, \
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.tm_sec = 0, \
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}
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/* Private typedef --------------------------------------------------------------*/
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/* Private functions ------------------------------------------------------------*/
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static rt_err_t nu_rtc_control(rt_device_t dev, int cmd, void *args);
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#if defined (NU_RTC_SUPPORT_IO_RW)
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static rt_size_t nu_rtc_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size);
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static rt_size_t nu_rtc_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size);
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#endif
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static rt_err_t nu_rtc_is_date_valid(const time_t t);
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static rt_err_t nu_rtc_init(void);
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#if defined(RT_USING_ALARM)
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static void nu_rtc_alarm_reset(void);
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static void nu_rtc_isr(int vector, void *param);
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#endif
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/* Public functions -------------------------------------------------------------*/
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#if defined (NU_RTC_SUPPORT_MSH_CMD)
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extern rt_err_t set_date(rt_uint32_t year, rt_uint32_t month, rt_uint32_t day);
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extern rt_err_t set_time(rt_uint32_t hour, rt_uint32_t minute, rt_uint32_t second);
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#endif
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/* Private variables ------------------------------------------------------------*/
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static struct rt_device device_rtc;
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static rt_err_t nu_rtc_init(void)
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{
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nu_sys_ipclk_enable(RTCCKEN);
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/* hw rtc initialise */
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RTC_Open(NULL);
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RTC_DisableInt(RTC_INTEN_ALMIEN_Msk | RTC_INTEN_TICKIEN_Msk);
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#if defined(RT_USING_ALARM)
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nu_rtc_alarm_reset();
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RTC_EnableInt(RTC_INTEN_ALMIEN_Msk);
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rt_hw_interrupt_install(IRQ_RTC, nu_rtc_isr, &device_rtc, "rtc");
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rt_hw_interrupt_umask(IRQ_RTC);
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#endif
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return RT_EOK;
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}
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#if defined(RT_USING_ALARM)
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/* Reset alarm settings to avoid the unwanted values remain in rtc registers. */
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static void nu_rtc_alarm_reset(void)
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{
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S_RTC_TIME_DATA_T alarm;
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/* Reset alarm time and calendar. */
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alarm.u32Year = RTC_YEAR2000;
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alarm.u32Month = 0;
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alarm.u32Day = 0;
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alarm.u32Hour = 0;
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alarm.u32Minute = 0;
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alarm.u32Second = 0;
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alarm.u32TimeScale = RTC_CLOCK_24;
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RTC_SetAlarmDateAndTime(&alarm);
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/* Clear alarm flag for safe */
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RTC_CLEAR_ALARM_INT_FLAG();
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}
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#endif
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/* rtc device driver initialise. */
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int rt_hw_rtc_init(void)
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{
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rt_err_t ret;
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nu_rtc_init();
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/* register rtc device IO operations */
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device_rtc.type = RT_Device_Class_RTC;
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device_rtc.init = NULL;
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device_rtc.open = NULL;
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device_rtc.close = NULL;
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device_rtc.control = nu_rtc_control;
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#if defined (NU_RTC_SUPPORT_IO_RW)
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device_rtc.read = nu_rtc_read;
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device_rtc.write = nu_rtc_write;
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#else
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device_rtc.read = NULL;
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device_rtc.write = NULL;
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#endif
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device_rtc.user_data = RT_NULL;
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device_rtc.rx_indicate = RT_NULL;
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device_rtc.tx_complete = RT_NULL;
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ret = rt_device_register(&device_rtc, "rtc", RT_DEVICE_FLAG_RDWR);
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return (int)ret;
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}
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INIT_BOARD_EXPORT(rt_hw_rtc_init);
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#if defined (NU_RTC_SUPPORT_IO_RW)
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/* Register rt-thread device.read() entry. */
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static rt_size_t nu_rtc_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
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{
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(void) pos;
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nu_rtc_control(dev, RT_DEVICE_CTRL_RTC_GET_TIME, buffer);
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return size;
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}
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#endif
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#if defined (NU_RTC_SUPPORT_IO_RW)
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/* Register rt-thread device.write() entry. */
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static rt_size_t nu_rtc_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
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{
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(void) pos;
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nu_rtc_control(dev, RT_DEVICE_CTRL_RTC_SET_TIME, (void *)buffer);
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return size;
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}
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#endif
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static rt_err_t nu_rtc_is_date_valid(const time_t t)
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{
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static struct tm tm_upper = RTC_TM_UPPER_BOUND;
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static struct tm tm_lower = RTC_TM_LOWER_BOUND;
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static time_t t_upper, t_lower;
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static rt_bool_t initialised = RT_FALSE;
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if (!initialised)
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{
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t_upper = timegm((struct tm *)&tm_upper);
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t_lower = timegm((struct tm *)&tm_lower);
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initialised = RT_TRUE;
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}
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/* check the date is supported by rtc. */
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if ((t > t_upper) || (t < t_lower))
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return -(RT_EINVAL);
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return RT_EOK;
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}
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/* Register rt-thread device.control() entry. */
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static rt_err_t nu_rtc_control(rt_device_t dev, int cmd, void *args)
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{
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struct tm tm_out, tm_in;
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time_t *time;
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S_RTC_TIME_DATA_T hw_time;
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#if defined(RT_USING_ALARM)
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struct rt_rtc_wkalarm *wkalarm;
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S_RTC_TIME_DATA_T hw_alarm;
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#endif
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if ((dev == NULL) || (args == NULL))
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return -(RT_EINVAL);
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switch (cmd)
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{
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case RT_DEVICE_CTRL_RTC_GET_TIME:
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time = (time_t *)args;
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RTC_GetDateAndTime(&hw_time);
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tm_out.tm_year = CONV_TO_TM_YEAR(hw_time.u32Year);
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tm_out.tm_mon = CONV_TO_TM_MON(hw_time.u32Month);
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tm_out.tm_mday = hw_time.u32Day;
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tm_out.tm_hour = hw_time.u32Hour;
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tm_out.tm_min = hw_time.u32Minute;
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tm_out.tm_sec = hw_time.u32Second;
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*time = timegm(&tm_out);
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break;
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case RT_DEVICE_CTRL_RTC_SET_TIME:
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time = (time_t *) args;
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if (nu_rtc_is_date_valid(*time) != RT_EOK)
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return -(RT_ERROR);
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gmtime_r(time, &tm_in);
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hw_time.u32Year = CONV_FROM_TM_YEAR(tm_in.tm_year);
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hw_time.u32Month = CONV_FROM_TM_MON(tm_in.tm_mon);
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hw_time.u32Day = tm_in.tm_mday;
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hw_time.u32Hour = tm_in.tm_hour;
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hw_time.u32Minute = tm_in.tm_min;
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hw_time.u32Second = tm_in.tm_sec;
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hw_time.u32TimeScale = RTC_CLOCK_24;
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hw_time.u32AmPm = 0;
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RTC_SetDateAndTime(&hw_time);
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break;
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#if defined(RT_USING_ALARM)
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case RT_DEVICE_CTRL_RTC_GET_ALARM:
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wkalarm = (struct rt_rtc_wkalarm *) args;
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RTC_GetAlarmDateAndTime(&hw_alarm);
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wkalarm->tm_hour = hw_alarm.u32Hour;
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wkalarm->tm_min = hw_alarm.u32Minute;
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wkalarm->tm_sec = hw_alarm.u32Second;
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break;
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case RT_DEVICE_CTRL_RTC_SET_ALARM:
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RTC_GetDateAndTime(&hw_alarm);
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wkalarm = (struct rt_rtc_wkalarm *) args;
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hw_alarm.u32Hour = wkalarm->tm_hour;
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hw_alarm.u32Minute = wkalarm->tm_min;
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hw_alarm.u32Second = wkalarm->tm_sec;
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RTC_SetAlarmDateAndTime(&hw_alarm);
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break;
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default:
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return -(RT_EINVAL);
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#endif
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}
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return RT_EOK;
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}
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#if defined (NU_RTC_SUPPORT_MSH_CMD)
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/* Support "rtc_det_date" command line in msh mode */
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static rt_err_t msh_rtc_set_date(int argc, char **argv)
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{
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rt_uint32_t index, len, arg[3];
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rt_memset(arg, 0, sizeof(arg));
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len = (argc >= 4) ? 4 : argc;
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/* The date information stored in argv is represented by the following order :
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argv[0,1,2,3] = [cmd, year, month, day] */
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for (index = 0; index < (len - 1); index ++)
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{
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arg[index] = atol(argv[index + 1]);
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}
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return set_date(arg[0], arg[1], arg[2]);
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}
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MSH_CMD_EXPORT_ALIAS(msh_rtc_set_date, rtc_set_date, e.g: rtc_set_date 2020 1 20);
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#endif
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#if defined (NU_RTC_SUPPORT_MSH_CMD)
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/* Support "rtc_det_time" command line in msh mode */
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static rt_err_t msh_rtc_set_time(int argc, char **argv)
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{
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rt_uint32_t index, len, arg[3];
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rt_memset(arg, 0, sizeof(arg));
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len = (argc >= 4) ? 4 : argc;
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/* The time information stored in argv is represented by the following order :
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argv[0,1,2,3] = [cmd, hour, minute, second] */
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for (index = 0; index < (len - 1); index ++)
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{
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arg[index] = atol(argv[index + 1]);
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}
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return set_time(arg[0], arg[1], arg[2]);
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}
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MSH_CMD_EXPORT_ALIAS(msh_rtc_set_time, rtc_set_time, e.g: rtc_set_time 18 30 00);
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#endif
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#if defined(RT_USING_ALARM)
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/* rtc interrupt entry */
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static void nu_rtc_isr(int vector, void *param)
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{
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if (RTC_GET_TICK_INT_FLAG())
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{
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RTC_CLEAR_TICK_INT_FLAG();
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}
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if (RTC_GET_ALARM_INT_FLAG())
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{
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RTC_CLEAR_ALARM_INT_FLAG();
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/* Send an alarm event to notify rt-thread alarm service. */
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rt_alarm_update(&device_rtc, (rt_uint32_t)NULL);
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}
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}
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#endif
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#endif /* BSP_USING_RTC */
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